Rock-crusher



J. B. LOW.

Rl No. 350,494'. Patented oct. 12, 1886.

im Il UNITED STATES PATENT OFFICE.,

JOEL B. LOW, OF SAN FRANCISCO, CALIFORNIA.

ROCK-CRUSHER.

SPECIFCATIO forming part of Letters Patent No. 350,494, dated October12, 1886.

Application tiled March 13, 1886. Serial No. 195,159. (No model.)

To @ZZ whom it may concern:

Be it known that I, JOEL B. Low, of San Francisco, State of California,have invented a new and useful Improved Rock-Crusher, of which thefollowing is a specification.

The invention relates to those machines principally used for crushingquartz-rock to a degree of ineness suitable for the grindingpans orpulverizers, though it is suitable for crushing other friablesubstances.

It consists in the combination of parts, as hereinafter described andclaimed.

In the accompanying drawings, forming part of this specification, Figurel isa longitudinal vertical section taken through the center line of themachine. view of the same.

In both figures the same letters of reference are used to indicate thesame parts.

The present illustration of the invention is intended to represent asmall-sized machine to be operated by hand for the light service oftesting ores. Heavier machines will be constructed on the same generalprinciple, but with slight changes in matters of detail, which willsuggest themselves to the manufacturer. AA forms the casing of themachine, made in two parts. The part A includes one side piece, the endpiece, c, the transverse plate a', and the foundation-plate c. The partA consists of one side piece only. The two parts are bolted together bybolts B.

C is the stationary jaw, pivoted above to one of the bolts B, auditslower end is adjusted by the handscrew D, -to vary the width of the'opening at E and regulate the fineness of the ore passing through.

F is the moving jaw. It is provided with a wearing-plate, F',whieh isfastened in place by the bolt G.

H is the brace-piece, which bears against the transverse piece c', thepoint of bearing being the fulcrum of the lever or jaw F. To keep thejaw F from crowding forward in case dust or dirt should accumulate atthe ful- Crum-point, there is a projection, h, on one side, entering arecess provided for it in the side piece, A.

b b are lugs cast on the side piece, A. They support the end of thetransverse piece a.

I is the hand-lever. It is supported on Fig. 2 is a plan,

trunnions J, which enter holes in the side pieces, A A. Between thesetrunnions the under side of Athe lever is hollowed out to loosely itover the circling top of the moving jaw. The trunnions are eccentric tothe circling top of the moving jaw, and as the lever is madeto fitsnuglyagainstthe opposite sides, it follows that a leverage is obtainedproportionate to the vertical movement of the end of the hand-lever withthe horizontal movement ofthe top of the jaw.

There may be provided a wearing-plate for the stationary jaw, similar tothat provided for the moving jaw, and it might be well to provide in thelarger sizes of machines the usual wearing-surfaces,which can bereplaced wherever there is frictional contact of the parts-as, forinstance, the holes in Athe side pieces in which the trnnnions .I workmight be lined, and where the brace-piece H bears against the transversepiece a a suitablewearing-block might be supplied. The presentillustration ofthe machine, however, isdesigned simply to show itsessential features.

The operation is simple and as follows: Vhen the quartz-rock is takenfrom the mine, and it is desired to crush it fine enough to feed to thestamp-battery, or, as theI case may be, when the tester or assayerwishes to crumble the rock fine enough for his purpose, it is throwninto the mou-th ofthe machine and the lever I moved up and down. be thatthe jaws C and F will be brought together with such force as willcrumble the rock to the finest degree, accordingly as the opening at thebottom ofthe jaws is adjusted wider or narrower apart. f

VlJat I claim as my invention, and desire to secure by Letters Patent,is as follows: b

The herein-described rock-crusher, consisting, essentially, of thecasing AA', provided with the transverse plate c', stationary jaw C,moving jaw F, having brace-piece I-I, lever I, provided with trunnionsJ, engaging with the upper part of the jaw F, the whole being arrangedand operating substantially as and for the purposeflescribed.

A. K. GOEIN, G. W. Low.

The result willl

